General vs. Specialty Contractor Rules in Illinois

The Illinois answer: there is no state tier, so the question changes shape

A general contractor licence and a specialty contractor licence are two rungs of one ladder in states that run a single construction licensing board. Illinois does not run one. IDFPR, described by DCEO as the main licensing agency for most professions in the State, publishes an alphabetical list of everything it regulates, and the construction entries on it are "Roofing Contractor" and "Qualifying Party Roofing Contractor" and nothing else. There is no general classification to sit above them and no specialty classification list to sit beneath.

So the real Illinois split is not general versus specialty. It is three separate questions asked in order. First: is my trade one of the handful the State licenses through its own agency, each under its own Act? Second: does the municipality where the work is issue a licence, and if so does it use classes? Third: what duties attach to the work itself regardless of either answer? A contractor who gets those three straight has covered the ground that a classification list covers elsewhere.

• State-licensed trades, each with its own agency and Act: roofing (IDFPR), plumbing (IDPH), fire sprinkler (State Fire Marshal).
• Municipal licences, which is where general contracting lives, and where classes appear if they appear at all.
• Work-based duties that bind everyone, chiefly the Home Repair and Remodeling Act on residential work.

Official sources: IDFPR: Professions and Industries Regulated by IDFPR; Illinois DCEO: Step by Step Guide; IDPH: Plumbing; Office of the State Fire Marshal: Fire Sprinkler Contractor Information; City of Chicago: Chicago Trade License Information Center; 815 ILCS 513/10 (definitions)

Where Illinois does draw a scope line, it draws it inside one trade

The one place a scope tier genuinely exists in Illinois state law is inside the roofing licence, and it is a good illustration of how narrow these things are here. 225 ILCS 335/2 gives two licence types. A limited roofing licence is "made available to contractors whose roofing business is limited to roofing residential properties consisting of 8 units or less". An unlimited roofing licence is for a business whose roofing work "is unlimited in nature and includes roofing on residential, commercial, and industrial properties". That is the whole classification scheme, and it applies only to roofing.

The tier carries real consequences rather than being cosmetic. The bond required under 225 ILCS 335/3(2)(d) is $10,000 for a limited licence and $25,000 for an unlimited one. The examination differs: IDFPR's qualifying party application offers Illinois Residential, Illinois Commercial and Industrial, and Illinois Residential, Commercial and Industrial exams, and it flags the Commercial and Industrial paper as the route "for individuals who already possess a Limited Roofing license and want to upgrade to an Unlimited Roofing license". Chicago echoes the same distinction from the permit side, noting that unlimited licence holders may work on residential, commercial and industrial projects while limited holders are restricted to residential properties of eight units or fewer.

The practical lesson is to choose the scope against the biggest job you plan to sell across the licence term, not the one in front of you. The roofing licence expires on December 31 of each odd-numbered year regardless of when it was issued, so an upgrade mid-cycle means an additional examination and application rather than a note on file.

Official sources: 225 ILCS 335/2 (definitions); 225 ILCS 335/3 (application for roofing contractor license); IDFPR: Roofing Contractors Qualifying Party Examination application (RF-QP); IDFPR: Licensed Roofing Contractor application packet (DPR-RF); City of Chicago: General Contractor License

Chicago is where Illinois contractors actually meet classification

If you want to see something that looks like a conventional general contractor classification list in Illinois, you have to go to a municipality, and the City of Chicago publishes the fullest one. Its general contractor licence comes in five classes defined by maximum project value with a matching minimum insurance figure: Class A unlimited at $5 million per occurrence, Class B up to $20 million at $3 million, Class C up to $10 million at $2 million, Class D up to $4 million at $2 million, and Class E up to $500,000 at $1 million. Class A and Class B permit ordinary or complex demolition, Class C and Class D ordinary demolition only, and Class E none.

The City defines project value in a way that catches contractors who think in terms of their own contract. It states that the value of a project is "the fair market value of materials and labor provided by all contractors and subcontractors as part of all concurrent and consecutive regulated activities at the same site". Your $300,000 scope on a $6 million site is measured against the site, not your invoice. The City also notes that its Class C and Class D insurance increase took effect January 1, 2026, and that for licences issued before that date the higher requirement is enforced when the policy on file expires.

What Chicago does not do is fold the trades into the general licence, and that is the closest thing Illinois has to a general-versus-specialty boundary. The City states that a general contractor licence authorises work by the licensed business, its employees and its subcontractors excluding work that requires a board-up company, crane operator, drain layer, electrical contractor, elevator mechanic contractor, mason contractor or plumbing contractor licence. Those are separately licensed and separately exempt: a City-licensed electrical, plumbing, mason, elevator or drain layer contractor, and its employees acting within scope, does not additionally need the general contractor licence. A painting or HVAC subcontractor, by contrast, needs no separate Chicago trade licence and only has to be listed on the permit if it will be scheduling inspections.

Official sources: City of Chicago: General Contractor License; City of Chicago: Chicago Trade License Information Center

The state-licensed trades do not overlap, and none of them is a general licence

Each Illinois state construction licence is jurisdictionally sealed. Holding one does not extend to another and none of them is a general contractor licence in disguise. 225 ILCS 335/9 confines roofing work to roofing licensees and their qualifying parties and, notably, sweeps waterproofing in with it. 225 ILCS 320/3 provides that "all planning and designing of plumbing systems and all plumbing shall be performed only by plumbers licensed" under that Act, with a licensed apprentice working under supervision, and lists a short set of exemptions including architects and engineers designing systems and an owner-occupant or lessee-occupant of a single-family residence who has "a current intention to live in such premises for a period of not less than 6 months".

The plumbing side then adds a second layer that has no analogue in roofing: the business itself must be registered. 225 ILCS 320/13.1 requires annual registration filed on or before the last day of September, sets the liability, property damage and workers' compensation minimums, requires a $20,000 indemnification bond or letter of credit, and requires that all employees engaged in plumbing work be licensed plumbers or apprentice plumbers. IDPH states that contractors must register annually and pay a fee, and that plumber licences renew by April 30 following issuance with annual continuing education.

Fire sprinkler work is a third and separate regime. The Office of the State Fire Marshal states that a Fire Sprinkler Contractor licence exists "to safeguard lives and property by regulating persons engaged in the business of planning, selling, installing, maintaining, or servicing fire protection sprinkler systems", that it is required of all individuals and businesses wishing to engage in fire sprinkler contracting in the State except as exempted in Section 15(c) of the Act, and that it is governed by 225 ILCS 317 with rules at Title 41, Chapter 1, Part 109. The Fire Marshal also licenses fire sprinkler inspectors separately and publishes a continuing education requirement for contractors.

Official sources: 225 ILCS 335/9 (licensure requirement); 225 ILCS 320/3 (licensing requirements); 225 ILCS 320/13.1 (plumbing contractors registration); IDPH: Plumbing; Office of the State Fire Marshal: Fire Sprinkler Contractor Information

Scope you cannot escape by choosing a smaller licence

One more scope boundary matters in Illinois and it is defined by the work, not the licence. The Home Repair and Remodeling Act defines "home repair and remodeling" as "the fixing, replacing, altering, converting, modernizing, improving, or making of an addition to any real property primarily designed or used as a residence", naming driveways, pools, kitchens, bathrooms, roofs and HVAC systems among the covered improvements, and excluding appliance sales and installation by merchants, carpet services and landscaping. It defines "residence" as a single-family home or dwelling, or a multiple-family home or dwelling containing six or fewer apartments, condominiums, town houses or dwelling units, and it excludes original construction and buildings of more than six units.

Two things follow. First, the Act reaches specialty and general work identically: a kitchen remodeller, a roofer and an HVAC contractor are all inside it when the property is a residence of six units or fewer, and the Section 25 insurance minimum of $100,000 per person and $300,000 per occurrence of bodily injury plus $50,000 per occurrence of property damage applies to all of them. Second, the Act's six-unit residence definition and the roofing licence's eight-unit limited/unlimited line are different boundaries drawn for different purposes. A twelve-unit building is outside the Home Repair and Remodeling Act and outside a limited roofing licence at the same time, for unrelated reasons.

Official sources: 815 ILCS 513/10 (definitions); 815 ILCS 513/25 (insurance required); 225 ILCS 335/2 (definitions)

Check the official page yourself before you file or sign

Illinois spreads contractor rules across more agencies than most states: IDFPR for roofing, IDPH for plumbing, the Office of the State Fire Marshal for fire sprinkler work, the Illinois Department of Revenue for tax registration, IDES for unemployment insurance, the Secretary of State for entity filings, your county clerk for an assumed name, and your own municipality for the licence that actually lets you pull a permit. No single page carries all of it, and each one changes on its own schedule.

Two practical consequences. First, before you file an application or sign a contract, open the specific agency page for your trade, confirm the figure you are relying on, and keep a dated copy of what you read. Second, call your municipality before you assume it has no rules: Illinois has more units of local government than any other state, and the absence of a state licence for your trade tells you nothing about whether your village requires one. DCEO runs a Business Information Center on 800.252.2923 for exactly this kind of question.

Official sources: Illinois DCEO: Begin Here; Illinois DCEO: Step by Step Guide